18157821440

Names of 18157821440

• Cardinal: 18157821440 can be written as Eighteen billion, one hundred fifty-seven million, eight hundred twenty-one thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.815782144 × 10¹⁰

Factors of 18157821440

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 91

Divisors of 18157821440

• Number of divisors d(n): 240
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 32 40 44 55 64 73 80 88 110 121 128 146 160 176 220 242 256 292 320 352 365 440 484 512 584 605 640 704 730 803 880 968 1168 1210 1280 1331 1408 1460 1606 1760 1936 2336 2420 2560 2662 2816 2920 3212 3520 3872 4015 4672 4840 5324 5329 5632 5840 6424 6655 7040 7744 8030 8833 9344 9680 10648 10658 11680 12848 13310 14080 15488 16060 17666 18688 19360 21296 21316 23360 25696 26620 26645 28160 30976 32120 35332 37376 38720 42592 42632 44165 46720 51392 53240 53290 58619 61952 64240 70664 77440 85184 85264 88330 93440 97163 102784 106480 106580 117238 128480 141328 154880 170368 170528 176660 186880 194326 205568 212960 213160 234476 256960 282656 293095 309760 340736 341056 353320 388652 411136 425920 426320 468952 485815 513920 565312 586190 644809 681472 682112 706640 777304 851840 852640 937904 971630 1027840 1130624 1172380 1289618 1364224 1413280 1554608 1703680 1705280 1875808 1943260 2055680 2261248 2344760 2579236 2728448 2826560 3109216 3224045 3407360 3410560 3751616 3886520 4522496 4689520 5158472 5653120 6218432 6448090 6821120 7092899 7503232 7773040 9379040 10316944 11306240 12436864 12896180 13642240 14185798 15006464 15546080 18758080 20633888 22612480 24873728 25792360 28371596 30012928 31092160 35464495 37516160 41267776 49747456 51584720 56743192 62184320 70928990 75032320 82535552 103169440 113486384 124368640 141857980 150064640 165071104 206338880 226972768 248737280 283715960 330142208 412677760 453945536 567431920 825355520 907891072 1134863840 1650711040 1815782144 2269727680 3631564288 4539455360 9078910720 18157821440
• Sum of all divisors σ(n): 48551530896
• Sum of proper divisors (its aliquot sum) s(n): 30393709456
• 18157821440 is an abundant number, because the sum of its proper divisors (30393709456) is greater than itself. Its abundance is 12235888016

Bases of 18157821440

• Binary: 10000111010010010100101111000000000₂
• Hexadecimal: 0x43A4A5E00
• Base-36: 8CAP4OW

Squares and roots of 18157821440

• 18157821440 squared (18157821440²) is 329706479446923673600
• 18157821440 cubed (18157821440³) is 5986751381408270022537641984000
• The square root of 18157821440 is 134750.9608129011
• The cube root of 18157821440 is 2628.3785462933

Scales and comparisons

• 18,157,821,440 seconds is equal to 577 years, 18 weeks, 5 days, 23 hours, 17 minutes, 20 seconds.
• To count from 1 to 18,157,821,440 would take you about one thousand, one hundred fifty-four years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 18157821440 cubic inches would be around 219 feet tall.

Recreational maths with 18157821440

• 18157821440 backwards is 04412875181
• The number of decimal digits it has is: 11
• The sum of 18157821440's digits is 41
• More coming soon!